Ignaz Unterberger (attributed To) ( 1742 - 1797 ) was an Italian painter. Ignaz Unterberger (attributed To) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 398.53 USD for Portrait of a gentleman with a sword in 2006 to 4544.79 USD for Portrait of Ferdinand I, Duke of Parma (1751 - 1802), whose reign began in 1765 in 2008 , based